asp.net中的htmlcontrol控件select的选择事件

trainli 2006-08-31 05:02:55

在<form action="a.aspx">里有两个<select id=1 runat="server"><select id=2 runat="server">
当我选择第一个的时候改变第二个select的值，我在.cs里写了第一个select的一个事件怎么就是不通知改变呢？如我这样写：
private void flh_ServerChange(object sender, System.EventArgs e)
{
Response.write("dlkf");
}
<SELECT id="1" onserverchange="flh_ServerChange" name="1" runat="server"></SELECT>

请问这样对吗？我用onchange也不可以，onclick也不可以！不知道这样要怎么去写！

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trainli 2006-08-31

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好长呀！有没有简单一点的写两个就可以了

xddouble 2006-08-31

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function change(coid){
location.assign("three.asp?action=s_s&cid=<%=cid%>&coid=" + coid);
}
-->
</script>

cctaiyang 2006-08-31

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楼主不好意思，以前做的例子找不到了，给你贴点代码吧，抱歉，不过道理一样都是多级联动

<html>
<head>
<title>js动态三级联动下拉表单试验</title>

<%
Set Conn = Server.CreateObject("ADODB.Connection")
StrCnn = "Driver={Microsoft Access Driver (*.mdb)}; DBQ=" & Server.MapPath("db1.mdb") & ";"
Conn.Open StrCnn
%>
</head>
<body>
<form name="myform" method="post">
<%
set rs=server.CreateObject("adodb.recordset")
sq="select * from 一级表"
rs.open sq,conn,1,1
%>
<select name="class1" onChange="changeclass2();changeclass3()">
<option value="" selected>选择一级目录</option>
<%
while not rs.eof
%>
<option value="<%=rs("一级类")%>"><%=rs("一级类")
%>
</option>
<%
rs.movenext
wend
rs.close
%>
</select>
<select name="class2" onChange="changeclass3()">
<option value="" selected>选择二级目录</option>
</select>
<select name="class3">
<option value="" selected>选择三级目录</option>
</select>
<%
sql="select * from 二级表"
rs.open sql,conn,1,1
num=rs.recordcount
str=""
for i=1 to rs.recordcount
str=str&rs("一级类")&"-"&rs("二级类")&","
if rs.eof then exit for
rs.movenext
next
rs.close
%>
<%
sql="select * from 三级表"
rs.open sql,conn,1,1
num2=rs.recordcount
str2=""
for i=1 to rs.recordcount
str2=str2&rs("二级类")&"-"&rs("三级类")&","
if rs.eof then exit for
rs.movenext
next
rs.close
%>

<script LANGUAGE="javascript">
arr="<%=str%>".split(",");
a=arr.length
ar=new Array()
for (i=0;i<a;i++){
ar[i]=arr[i].split("-");
}
onecount=ar.length;
arr2="<%=str2%>".split(",");
a2=arr2.length
ar2=new Array()
for (i=0;i<a2;i++){
ar2[i]=arr2[i].split("-");
}
onecount2=ar2.length;
function changeclass2() {
document.myform.class2.length=0
lid=myform.class1.value;
for (i=0;i<onecount;i++) {
if (ar[i][0] == lid) {
document.myform.class2.options.add(new Option(ar[i][1], ar[i][1]));
}
}
}
function changeclass3() {
document.myform.class3.length=0
lid2=myform.class2.value;
for (i=0;i<onecount2;i++) {
if (ar2[i][0] == lid2) {
document.myform.class3.options.add(new Option(ar2[i][1], ar2[i][1]));
}
}
}
</script>
</body>
</html>

Reqeust获取参数实现动态三级联动下拉表单


<%
dim cid,coid
cid = request("cid") 'cid 大类id
coid = request("coid") 'coid 中类id
set rs=server.createobject("adodb.recordset")
sql = "select * from edu_c" '表一大类表
rs.open sql,conn,1,1
strOption1 = "<option value='' selected >==请选择所属市局==</option>"
do while not rs.eof
if cstr(rs("id")) = cstr(cid) then
strOption1 = strOption1 & "<option value='" & rs("id") & "' selected>" & rs("c_name") & "</option>"
else

strOption1 = strOption1 & "<option value='" & rs("id") & "'>" & rs("c_name") & "</option>"

end if
rs.movenext
loop

rs.close

if cid <> "" then
sql = "select * from edu_co where c_id=" & cid '表二中类表 bid==表一中的id

rs.open sql,conn,1,1
strOption2 = "<option value='' selected >==请选择所属县局==</option>"

do while not rs.eof
if cstr(rs("id")) = cstr(coid) then
strOption2 = strOption2 & "<option value='" & rs("id") & "' selected>" & rs("co_name") & "</option>"
else
strOption2 = strOption2 & "<option value='" & rs("id") & "'>" & rs("co_name") & "</option>"
end if
rs.movenext
loop
rs.close
end if

if coid <> "" then
sql = "select * from edu_s where co_id= " & coid '表三小类表 mid==表二的id
rs.open sql,conn,1,1
strOption3 = "<option value='' selected >==请选择学校==</option>"
while not rs.eof
if cstr(rs("id")) = cstr(sid) then
strOption3 = strOption3 & "<option value='" & rs("id") & "' selected>" & rs("s_name") & "</option>"
else
strOption3 = strOption3 & "<option value='" & rs("id") & "'>" & rs("s_name") & "</option>"
end if

rs.movenext
wend
rs.close
end if

%>
<select onchange="changeb(this.value)" name="cid"><%=strOption1%></select>
<select onchange="change(this.value)" name="coid"><%=strOption2%></select>
<select name="sid"><%=strOption3%></select>
<script language="javascript">

</script>

cctaiyang 2006-08-31

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trainli 2006-08-31

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this.Select1.ServerChange += new System.EventHandler(this.flh_ServerChange);
这个已经写上了呀

可以用JS实现联动效果嘛,也可以用js来提交你做的操作;<select id=1 runat="server" onchange="document.submit();">

但这样会把整个页面提交了，我是不能把页面提交

trainli 2006-08-31